{
  "manageEntity": {
    "action": "Save",
    "entityId": "672126405",
    "entityType": "Track",
    "nonce": "0xe7c267e9220153b2dc05daa13e360ad08f8f58816cabc276fdf6dff4a99b9151",
    "signature": "0x2dd8af2f3d7ad1b920f6c3b9d7019a02252896d41140ef30d3120803f1356c01659122a935dcf5db9a96028129da276d8741131abaaca81b2c42ddd92d0c49161b",
    "signer": "0x4810fE66B3A42DA4cb34b622aD9A069C293c6b86",
    "userId": "445042807"
  }
}