{
  "manageEntity": {
    "action": "Save",
    "entityId": "1746616910",
    "entityType": "Track",
    "nonce": "0xfe71fed937cbcd0cb27ee16f2dc58f2eebebf519ed764cd4dd95e03f8a343d8b",
    "signature": "0x9cf0cffa97b60b3d32a3364f9b09c27bbfe36c02af5c0a03675609807906749976efec2b5fd04a287c4c587b43a3f32091f5e2d393f70541eb50c663d62986fd1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}