{
  "manageEntity": {
    "action": "Save",
    "entityId": "319046",
    "entityType": "Track",
    "nonce": "0x8a218a6a9047c351b4bb58dbe009541336ba1cd2bb816c9a0b2e16bcfc197910",
    "signature": "0xd2ad8565cb6e1a69aca567a57f20f9c976910c76baa801ccae9fba71c9ba8db0215bd2d243b451fd15ac3a0f9b22346cf136d6267a9240e8d578c308b18787b31c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}