{
  "manageEntity": {
    "action": "Save",
    "entityId": "377833095",
    "entityType": "Track",
    "nonce": "0xa1f6c0d993cec97de99bc26c3215f6b3a115733c30ac35039bbaed6d9afc43db",
    "signature": "0xd6d980ed0370a7bd3080e00d8b7b7344aee2184499c343c99d438095b2ae279e62edcfabf7797884bb4ef40df95dc44f2f008159d2e295b60301e2f6dc5b9cce1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}