{
  "manageEntity": {
    "action": "Save",
    "entityId": "837254962",
    "entityType": "Track",
    "nonce": "0xd9d54e6f9d443ac3e47226a0c51b29cf75daa86e8b297020146e08c555274d42",
    "signature": "0x7fcfd0d0e2cf4cd6b8128d0e98fb4334b9f3cca4bf32b1f1309172779afb6bd3659ac855ca36671f10dc2e42338a9ce99ae205047cc88ec89c5f3b4238b999171c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}