{
  "manageEntity": {
    "action": "Save",
    "entityId": "214801",
    "entityType": "Track",
    "nonce": "0xeb272855ed35c3b51237f2cda996bedce90e8838d4969d1d0a1fbf3f0a35b64a",
    "signature": "0x37034ca8f1abc4f820711819c2ca1d7cb0e4ad60aa5bc37098b043a0dd1079e548b04c8e119b5875551e1973571f764cf35ec0e51472614e88388b2d5a6920611c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}