{
  "manageEntity": {
    "action": "Save",
    "entityId": "1511661517",
    "entityType": "Track",
    "nonce": "0x403be6b89f10d867188631da2e23e7610348bf52d11f788236f7dd1582ed0464",
    "signature": "0xe4064f9dbe417314797dd437c8cb5bf5b82c126b1ae3d90fda9482ca8e8b2f9310b2a0ebd55d20e61cf4eb48dc1c653cbada9f977d6c237c77e524ed963c71ac1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}