{
  "manageEntity": {
    "action": "Save",
    "entityId": "291026374",
    "entityType": "Track",
    "nonce": "0xcbdf42abdf690b69e758a2afec162065ccd78f19cf5c1c1a5be26f6e6e27df54",
    "signature": "0xf6f91ffd28b43e2067504e9bb34a52eea07a2435f3bdef7c4e941e4fc9bf84033020be650c11c1bda71b8520c54a0ac2a72dcfe68475b831e6a3c34d4dfaa6d11b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}