{
  "manageEntity": {
    "action": "Save",
    "entityId": "245712830",
    "entityType": "Track",
    "nonce": "0xa48a17bc4456b7d86676f1c9bd0cfffd79cc0800bec605af25a0d4b33c7efe9c",
    "signature": "0xa1582d1909abcc27f8bfc7a2ee9ca886689889e2bdcf5dac6b1f84c5bb282912693d8ced459dd2be4df7fc4d9f4de9b6a41dfd2d009c82261678b02a5ff8549b1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}