{
  "manageEntity": {
    "action": "Save",
    "entityId": "1030584",
    "entityType": "Track",
    "nonce": "0x4a81ac76af9a6091e14f1998ad64a8b8834110b88b0d4019b111531826be7fa5",
    "signature": "0xfbc856baa97c7ef43d0e5cd9f47e64f2b79d3f3b918caf129dc29a51fff6e449362eefbd84ec21a86af01bc645b2ff8395506655ecedba4d40515aeab7f55ce11b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}