{
  "manageEntity": {
    "action": "Save",
    "entityId": "634995",
    "entityType": "Track",
    "nonce": "0x262727959e1533fbcb5ba0c46072864f152ee51807d80bde4247bfd94f63a360",
    "signature": "0x32b36a4d0c73d5ac3c857e6906b2c67313286468dc37f8964fadcb28f5afbff33d41f165164c7e98ac56cb2fda20053feced7a85e97c1db69092a271f804396e1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}