{
  "manageEntity": {
    "action": "Save",
    "entityId": "15793452",
    "entityType": "Track",
    "nonce": "0x711ceb3896f98802d0dd06990b8edefdcdf1111418f04adc239b0cbc66bac9a5",
    "signature": "0x2e7bc65778a7a0ffe7c64ab567893d18fb6e51c8c9e6225d6f8d2fd9afd26662382a6389a3a51103afe2fc3d3be0d6908703e9fbe07dba07a675b85357c3c1ef1b",
    "signer": "0x48997477d821e30d3Fa835d1Ee7809B3253Cb100",
    "userId": "75085"
  }
}