{
  "manageEntity": {
    "action": "Save",
    "entityId": "562681537",
    "entityType": "Track",
    "nonce": "0x4a2bb26409ca0b9532b7cd58f1f96b138327d41e626eef8e5ad79196a8a74ef2",
    "signature": "0x980fed7539ca0916d96dd1a4ba2471a69e52796ecd8a58fc16eb4180c229b63509d3aef7ee037a23a9d974115e1ec00319d2e734fb5d31f8bfc07a4f820fad7c1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}