{
  "manageEntity": {
    "action": "Save",
    "entityId": "889618355",
    "entityType": "Track",
    "nonce": "0x24ac7302c3fb653ca8dc18d7f91ade90bdb2e1278beed7a6b840c49c588581e9",
    "signature": "0x9e6166e84b647c25d135a3c87ccaf6d6c843427a6527e090345321ff9d6c15f2180f7a582696f9adfa046e0a1c623e3fab2247fe006af9e33113e7d2312d859d1c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}