{
  "manageEntity": {
    "action": "Save",
    "entityId": "267881",
    "entityType": "Track",
    "nonce": "0x5a267f1303ec796dc3b0fcf1af7165f553791fe06e7c0e3600b0c6db1b9eadc0",
    "signature": "0x8c59418b44b69d7a02e0e633299dd0fda4fdd80f7c4c0ca02768907b6e665cde1e9b45df25005ddb499043c218727f6e4b0fc2429bcc6f7c45ee4d58e938f8371c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}