{
  "manageEntity": {
    "action": "Save",
    "entityId": "1773993246",
    "entityType": "Track",
    "nonce": "0xd7dca9ecf2730d32629ac8f80ecf2b50ce47fa960bbf079ca715d7a8f13f34fa",
    "signature": "0x12ad53c838a98a428e12eae2d719487f2e39546a9b58abfeb5adfb3d3b2ea11f5afe8aad08361cd4373841994c9049a992e12081dfaf5df3b2b67298e5ba0a1a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}