{
  "manageEntity": {
    "action": "Save",
    "entityId": "214776",
    "entityType": "Track",
    "nonce": "0x36a53780053a9379800dff7f43fa5ee9c22235f804e3263cb8efbfe50da95c0e",
    "signature": "0xc363947ce562ec2249410c26a554f3a4818bd6647af79da6a490157674b41d263e47d59610f79b2acbfb005ead795d6d1199afb7b0d94f2a86ffdeff4c184af71c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}