{
  "manageEntity": {
    "action": "Save",
    "entityId": "1881075494",
    "entityType": "Track",
    "nonce": "0x224cd4a25e4e918cad9e1197e607816ad4b0e8f17736cc6f1bbcb4d365bc8890",
    "signature": "0x45f44bbad4963404b06baef7528bc745a53177030d0448a0e555e833edca86ce032cd0f3474121e01cabd6591b88a84f20eef9076b3dd51092b60bd89fd643951b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}