{
  "manageEntity": {
    "action": "Save",
    "entityId": "501625159",
    "entityType": "Track",
    "nonce": "0x27f325fcbbc90a8610dd0bf69e76bd220e8fbd781c13d3a635632d2c764ab182",
    "signature": "0x0933712291895b543c7d769d672d937926064e62085f7fdeb0de9abde60c80d51b9ff235c8cef88d48a3025151c413e6ecdcdfd5ad9c03de390abe0066a4b72b1c",
    "signer": "0xaFdEC27229de1023f5322f4Dbf0e874dC548011F",
    "userId": "817564020"
  }
}