{
  "manageEntity": {
    "action": "Save",
    "entityId": "119411214",
    "entityType": "Track",
    "nonce": "0xcdb22d04210e5624ddbc7dbd899c1e7b705287e020f19a2aab8609f0aea04a58",
    "signature": "0xb6ece3779e607847efd45abb99cedc02e95678d01cd7fa42a8e4fc54d66819be6448869d14c6b6a1c18573f4322ff7815bf26da93d56bbc77641d7344ad9bfea1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}