{
  "manageEntity": {
    "action": "Save",
    "entityId": "1873406708",
    "entityType": "Track",
    "nonce": "0x75d265042882ad98b762e19651338e278cf4e185fd295a7ca65fad97459c2a64",
    "signature": "0x137a516798182b582c65a5c1ae0aaaff9cf62f03d8c75fa2dd3f2320c3a169f51540754d4a21da2c6303c1e0381dac0fb91ff76436891f149d6cd2b3fa29bbe71c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}