{
  "manageEntity": {
    "action": "Save",
    "entityId": "115514793",
    "entityType": "Track",
    "nonce": "0x56df7a49f4070589ecb221b57ded271042fb712cbf0e1ffdcd3085e1eabcda48",
    "signature": "0x30e7c7965c2e99922f3492347a289da2e7f24fcc1cb4250036d33bca9243f45f234fca75e112b235c95fc6ad7bdb0c1841e9ab432b2a64b67efe3400c35935771b",
    "signer": "0x94072C091E5edAf7bbccf2aC8257a1590541a307",
    "userId": "987917854"
  }
}