{
  "manageEntity": {
    "action": "Save",
    "entityId": "1783053507",
    "entityType": "Track",
    "nonce": "0xdc638b08b51850c4df9b4bd8108576f03c7c1ff4cc929663017ae13abf2160b7",
    "signature": "0x814fac5f4a9e5f406bc9e80cb9450a581e2d8cbbc86bca3b3a8c2e36d55cbb1f565ede168df235a37fd0fbec832db2277ddf46b2a4aaa8e67ae007e5af0f14281c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}