{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906495768",
    "entityType": "Track",
    "nonce": "0x0501ca50305c0af163db6a18aad667e975ebed7af72a413396b5970ae4e56a28",
    "signature": "0x11648dfa79afd0521ab2cbf8352bf545741249b875b7e2e7c096787904bceb1811e878d79f47d3bdf29d5654750bda160260f99d403b21e22d13bc31314175511b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}