{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559945510",
    "entityType": "Track",
    "nonce": "0x156520b1dcb2566224bf40eb2b4d13d424aa65935293768e55f6e86bd9c291c2",
    "signature": "0x363f14272e537c4ba239e6219ef3732f171029fb73bdde82b649dd51d83b8eed1597afe2ab101eb4e5ff32e1b19b80803a97f7e528ade7dea369692c3a4645721b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}