{
  "manageEntity": {
    "action": "Save",
    "entityId": "1755778660",
    "entityType": "Track",
    "nonce": "0xcc9c3aff1a74b2dd513cd1d62768bf5f67680ed29c3366133c0ca940a6100127",
    "signature": "0xec35e0fff7c36e2959a41103fc1ac7cc6e6b4938e86ab6027eba81561fbcea820fa3c507a142a022e45331affcd37b3645d41ff15636f7a3da9cb7ef3d7840821c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}