{
  "manageEntity": {
    "action": "Save",
    "entityId": "2090470312",
    "entityType": "Track",
    "nonce": "0xfc95d36d4847d7937e2c2e56e04f4794080e6b6f3d8ac8ee821a3b3d9800e6a4",
    "signature": "0x562ecd63771e7f2f7f0ac76d11e90184443a37f0b2a2af64bc63b00010fc650e70eba5207ff448d4ccaf499d5fc8b4bb50cbc3957fd065f74339d0a28cfaa8711b",
    "signer": "0x38648cAE6c1E69869B895d522E9Bd0f99400A573",
    "userId": "859952725"
  }
}