{
  "manageEntity": {
    "action": "Save",
    "entityId": "559540256",
    "entityType": "Track",
    "nonce": "0x6e510ea11d13becc0d71289400287d661504d349e3d5da3bdb41bc29abcf1071",
    "signature": "0x264f2ba5bee35266a82171ff11d9a7843d9a80d9a51bf6ccb2b57aef99a922b05dab803c345af90b86c7b99d9738251806397238e1ad26f7998f592bcaf157201b",
    "signer": "0x0E6Ef8dF2F401D8918d603B82ef321D94A721556",
    "userId": "648802251"
  }
}