{
  "manageEntity": {
    "action": "Save",
    "entityId": "1770750589",
    "entityType": "Track",
    "nonce": "0xcfb3fcaa48b9659067199a820cf5615434796b33859193a4af588529ea8a4978",
    "signature": "0x5e4e34d3720b9962dcb35c11db3f602c0f15fb3f59c6d987e9595a3b99b48a8a4b8e2cbb6eab5806163b1706f6599a90b341fe0067c9186285dbbaa5d9a9e43b1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}