{
  "manageEntity": {
    "action": "Save",
    "entityId": "984891490",
    "entityType": "Track",
    "nonce": "0xcf0fcb2c1af30dccc4312ec8fe366fe0ed78b25446405182b4e02f11b17cd9f3",
    "signature": "0xe902fa121001295d0fd1d29214f5ded5898af5e9ea0e220e02e1d872be40b7770da6332b10a058a66f1d88c8d9debefb973d90395d0507df996b04abd4dd339b1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}