{
  "manageEntity": {
    "action": "Save",
    "entityId": "901871700",
    "entityType": "Track",
    "nonce": "0xcec3b10a828f807e989ef871cd954266ad37b748508bd61c15a7fc5969666f2b",
    "signature": "0x23d61f39a1796cd4122f846af87aeef41f6e6bfc7c207603dea0327f953f84ac701400cc5e76855baa8fa2dcb996df1dc780b5724d3b9c7a60160024e5403d401b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}