{
  "manageEntity": {
    "action": "Save",
    "entityId": "1947594536",
    "entityType": "Track",
    "nonce": "0xc82f60eefdd4b4440286146a00c1d319e181eac947e76af75315b0dfd9866f43",
    "signature": "0xbf38a8ac246c8110ded5da2f0f93869793eddf336484b343fc5fdab93fb878b97b450d4e86637fb08ca83a1cf8dd172661b2d452e20035bd6edc23d068f06a2c1c",
    "signer": "0xa372026fB2EE30b6F81CE820DcE21B455686A702",
    "userId": "344222954"
  }
}