{
  "manageEntity": {
    "action": "Save",
    "entityId": "532172751",
    "entityType": "Track",
    "nonce": "0x97643ba3d2f58a0d147a26f9b9c3d81e848f176956ddf342741b4753be6a03dd",
    "signature": "0x900e8ae3190a433394b3b89bf3c46ea1356f531d3932b607b65343c2b0e8ed9d6875b3f79c3bd7a6ecce0aa755c935cfc97be24652e3f4a6bb1b0a645e7f5bea1b",
    "signer": "0x8fb06be829c5718Bb968af1525d910B795617ac0",
    "userId": "950478625"
  }
}