{
  "manageEntity": {
    "action": "Save",
    "entityId": "1516448291",
    "entityType": "Track",
    "nonce": "0x4061fc4a1b4ac3a7489b65f65bb0d733d41782a085049be4a629538bfbb02910",
    "signature": "0xcb6b36ff4cb13380c1ea6a0ea98e68300cdcac3595f95d064d95fcd4953b33b56e3c12539f86f8608153a9c30f14bed85a8be1870d3c2efee3ac21384e91b73f1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}