{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142787428",
    "entityType": "Track",
    "nonce": "0x70208bb5b967e94695a9bc24c648a6fcdfd55d8f6c71ef6fb8e844974448fe47",
    "signature": "0x22e90013e68880c3572796c1a69405a55eb3242cdea784d99a77a85ceee642526d2c31d3666fa54bb5da1f2f1f4e186f175797760d83e30abdc69aad71c3a4f21b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}