{
  "manageEntity": {
    "action": "Save",
    "entityId": "380636299",
    "entityType": "Track",
    "nonce": "0xdb84c45d727de89733bc62505695289379aaadfea13bd6e2f1a98d6e6bbed77a",
    "signature": "0xaed2d1d1fda73a7a1fce545c08bd3fb6bcebdd033eb760ffe37cb2a16a072f5536efd77bd03ce415bd77b48daed10ee8fcd0142042710e2000f784a740d76c3d1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}