{
  "manageEntity": {
    "action": "Save",
    "entityId": "811428",
    "entityType": "Track",
    "nonce": "0x894a2caa29ac2a0f2456aa3db0cfc116c04f9aafde52d194d87166e617d2588d",
    "signature": "0x8cb1c508e23a505c1816edabc5c2f3b32f9f3fc515fb8c69dfd830785139f2d175ae0a6bf1b9a857a8e5f2c57cd90f6d5fbcd48e5a232faef97047b7319709df1c",
    "signer": "0x98fC2b30E6e70e62dB2b5fAE7b0292DE3D4323Bf",
    "userId": "480962013"
  }
}