{
  "manageEntity": {
    "action": "Save",
    "entityId": "1602164937",
    "entityType": "Track",
    "nonce": "0xade3459c2ce0884f3cd4d6d10d3f027ff0c4cee966d4dd920fca9a7a9fa3b789",
    "signature": "0xa9c2990e92a7176ca3e1f00208da130974a5dac8b463c8c13d78235f8a8100ed206d1745e7f134843c82802a8c2a8dad63e3a651834bcf6122e4c9838b82e6511b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}