{
  "manageEntity": {
    "action": "Save",
    "entityId": "261766792",
    "entityType": "Track",
    "nonce": "0x6e8cf76093709c81ef2c8d2408029eb8e3d3a96b20700a5101136d5f111f7ae1",
    "signature": "0x2ba23d35694acaeab5f939b8755e849f48a6d100cbed5094024a5030054d149426c665f0367b5a509269b22e15ea309c0341a7c262b564f09e9e74b7a457ade21b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}