{
  "manageEntity": {
    "action": "Save",
    "entityId": "1872835149",
    "entityType": "Track",
    "nonce": "0x7918fae0e55c29fb68fd307b10f07409e723a4c82a6768c42a545f2cfb9a4d6e",
    "signature": "0x8c63dcd876cd7007627269514ee31b12fad80c72e069f1c37741e6ffebcb5f7f6d5e9f81afe49dd4a19d56ab761a1116acb1168195d46ee011528562441e42431c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}