{
  "manageEntity": {
    "action": "Save",
    "entityId": "1327902948",
    "entityType": "Track",
    "nonce": "0xa3b022b497d2a2b744f506e865262cf05bb811eb0734c175830550717147853b",
    "signature": "0x03c95491f9afc8cc5b2eebf1278725829bd194c07cc013206b23e53564ab890f5ffc55752aa6c6598044bacefa6434473941ff01481900151478cbde40e4849b1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}