{
  "manageEntity": {
    "action": "Save",
    "entityId": "1445159197",
    "entityType": "Track",
    "nonce": "0x8421b5a5db25e836c3dd8b3b3367cedb8cb4d51ef8594259a42acad6e9bd7fc1",
    "signature": "0xad35d7f15a795d6c6d50dcf081020ddef74cbab94d9c6fdb6a8b6378dd8afd80307580d6643f2e70af79dcb6abfc4ed92f1eff3c5c924b0a792f59b72aa73a351c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}