{
  "manageEntity": {
    "action": "Save",
    "entityId": "14752670",
    "entityType": "Track",
    "nonce": "0xc90eeef80b8966b47a0d15822f6da1aec2608e89186646f8b49d6d1078f15996",
    "signature": "0x577b87947cf12004d13c33f1c175ce558d7214013832abafd66f4e64c7d74f944645c7926bedf0e0e69d1cf08025a0b0c30a38ec323b1e1808aa0e6453eb66861c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}