{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780774284",
    "entityType": "Track",
    "nonce": "0xeed9bc345c7916830519a4dd6e03a14fae99a71990083c0c9c0b743826c2473d",
    "signature": "0xdcfc4d97014a3cfe728f724ff3565151eb2551b09dd79bb09acc0a183cd16aa96118ba29063e9c2c0f8691ab8c1b63042f8daee8a2c4b98e6f054b33febf3bf31c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}