{
  "manageEntity": {
    "action": "Save",
    "entityId": "902874991",
    "entityType": "Track",
    "nonce": "0xaae02a73425cc4ad2d0c9973eb1e11853e872c42fa539f6c10d4299dd8f3a528",
    "signature": "0x1e53bf9b4c3e79a0c7756aae7c6964aba295af83c9711b42fd9fa3ff7117b1676992b89e980dc42b03e107b4ecd1f22e63bfbff71a9780c4c7c380a0935498221b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}