{
  "manageEntity": {
    "action": "Save",
    "entityId": "1892992338",
    "entityType": "Track",
    "nonce": "0x2fecebd08e3c39891eb4f4bd4893054eea29a75fcc24a29b728632c7384b3d0c",
    "signature": "0x7da5d5cff3b74d8e5e327c3615bc3009386bd9006537427f9d74d031913b48365dd59e3a40d0a2293eac1e406eba2a4cb407626f744d2bc82fb2608bb24952f91b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}