{
  "manageEntity": {
    "action": "Save",
    "entityId": "237056173",
    "entityType": "Track",
    "nonce": "0x51aa720080f309889c49567edaffa74b0631555770e57fd8190526368e4305f7",
    "signature": "0xba2149405e3feb0cbd6d38293ea0adc483912650390ce10cb918ff2df8f6aca509e42174532ea35db2c295f8b2d691c698331c3ce10f886c99941d9569eecc0e1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}