{
  "manageEntity": {
    "action": "Save",
    "entityId": "868340194",
    "entityType": "Track",
    "nonce": "0x2e15786b356790b47a50990a5417aab110161ec89ea735ef93494b14b6385c9a",
    "signature": "0x76b381ddead1a98c7a7749e8b5ea040e10bc5f37d439ae62ead112302bd8e2a3651fb5eec1dd835d7867f296e5864c4a1d73e3d7f0a5aaadb2dc6a42e50a89e01b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}