{
  "manageEntity": {
    "action": "Save",
    "entityId": "183688874",
    "entityType": "Track",
    "nonce": "0x82b45e054cc11e6bc7c6c69bbbaac12e7684c459d7b2ff9a56fa34770a2a5f42",
    "signature": "0x618db9af05d13b480fb4824fc1c49594006b719a6d07e769a142ab65c1371299361397d9fa4c586788a71b7a9502e4a26c60945ba3ec3fcfa6b14d71fc6ba0a21c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}