{
  "manageEntity": {
    "action": "Save",
    "entityId": "1264066407",
    "entityType": "Track",
    "nonce": "0xbe5a8766a504cf87e485ac52622c6b73caf86ff6316ec1205bbcecc688e80969",
    "signature": "0xfe8bcc58cc383eab35c86ccefd65fd9e5f24be9f83cd786d82a4ae2b19d71a75541f1a0a8970d8b21b32a5f4e1eb6dc9d5e63f91b274f351a09f963e286497431c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}