{
  "manageEntity": {
    "action": "Save",
    "entityId": "2022480908",
    "entityType": "Track",
    "nonce": "0xa6748129f5801a63fb8df96e60a80c2279e371bf87c9c3f2bac6e1c6b2f828d4",
    "signature": "0x64e96c5fe11c4b2e950fc6289bd874b37207abb446e2ef3c3c3ec294fc61b936129be89c2f341bcaa74cd35fc1ff121356f32ccfc78f7e3adf1cd85db18931311c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}