{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834641839",
    "entityType": "Track",
    "nonce": "0x38bec661c8c5eca6f77537d460b3cb17062f547178c916c018f15b13bbbb765c",
    "signature": "0x1d73d989ad79e4425ce0df98849d0c1a3f55789ab27ccefa204da2979b20c3d65f46f7cb3e8641a0f5d2fba4f99caaa5d2305bc5e2b5138d20c0cdd0841007861c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}