{
  "manageEntity": {
    "action": "Save",
    "entityId": "2121617632",
    "entityType": "Track",
    "nonce": "0xcbe1bfb53269fbb06d06d738803f0ae54f65ab3308a70eec6442a25143dc023a",
    "signature": "0x81a8f26ab3d02b77094e6603f16a0ec3f06666413a81c1f642b1cb6c6b4c27d2497b6c5db469996127942b681994deed5a2b20e5adf8f5ee6f4f285d81dab01d1c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}