{
  "manageEntity": {
    "action": "Save",
    "entityId": "215928251",
    "entityType": "Track",
    "nonce": "0x631ca16ec3b6629018d8e49a0047a525522955dce60dd0f8e5ef0dfdc78f6c93",
    "signature": "0x5ee1573cf4982ebd60372ef4783291fcb35db89a6e607b29362a6e76407b9efe5bc316a2d2ed70153799edb99242d1d64d8da8bd98517b3170ca85dcb9f8eeda1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}