{
  "manageEntity": {
    "action": "Save",
    "entityId": "954466",
    "entityType": "Track",
    "nonce": "0x11554dbab04b0876ac828f8b174d8d5cb1c77921c27c07362c422df7bf4a774a",
    "signature": "0x99c9196bebfc856c0b36d70274b6aa706823e8bb58bfa30bf0bc2c0022defc2017d10d4b1b1523766d819ec2bd9b165bdeda197c97a7a1df7c6dc28cbf5e9bc51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}