{
  "manageEntity": {
    "action": "Save",
    "entityId": "359418",
    "entityType": "Track",
    "nonce": "0x6a2610f5266418c7696abef6a8c595cf82d55c42794090124746ddb24164a66f",
    "signature": "0xb189deece55d11b84b12bfd0017b1bdea3a8059a1bf023d6f742e16b2fcf7c2526a7182a23d4d1f45de19896765a7d11331babc832dc4ab7c3bd78caa5301b4a1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}