{
  "manageEntity": {
    "action": "Save",
    "entityId": "291860299",
    "entityType": "Track",
    "nonce": "0x1f677b6f7ffb4804bf0c32262a8162733582d227476606f13ba627dd77377416",
    "signature": "0x7757235d7323ad3f28c56e7b895bbc55b13fef7d361927422eca7f7c4f7262753b1620a4314e7c00213b10420f85c52eff151bb49db1bc30f73892c7d50471491c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}