{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703248148",
    "entityType": "Track",
    "nonce": "0xb940e152f43931cff2edcb61a8d9459330d7d964eb3cb86eeca5f0b6bf04f21a",
    "signature": "0x46b00fd53dce2046ede79e7c3eb25c5a4946c00d745e86d7255034d11243e3fc6d94da05ff116716d2eb2585b1a1a52c754f4db9dbf0a41d32c07b88f65006531c",
    "signer": "0x195d9eE11400245E841C02c4b4288a90A8195e91",
    "userId": "103785872"
  }
}