{
  "manageEntity": {
    "action": "Save",
    "entityId": "903979744",
    "entityType": "Track",
    "nonce": "0xdb13382fea4d57f30584d7ecd973e9e5692cdbd123b5bd9d543de39a986f0154",
    "signature": "0x9dc71e95e99ff979f89918005074dbadf8afe5cea4e2c2d5aaddb54b1e30126e1e200751cc2940e57bb569744d85985f028439be15c952d574c7251d18a469dc1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}