{
  "manageEntity": {
    "action": "Save",
    "entityId": "1707973827",
    "entityType": "Track",
    "nonce": "0xff48fd685244c4e63e8db98dfde07b7c3b75686b2b6050973b5f4316ab3256bf",
    "signature": "0x73300348c4b593855ac896cf081eb78d2210d65f66b171ac36ed7775b8cd0c8a637592b5ec08cf2c64477ed19595a9c1bbc7b25a92bc855a9aa254cd7cf2b3971b",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}