{
  "manageEntity": {
    "action": "Save",
    "entityId": "77619739",
    "entityType": "Track",
    "nonce": "0x336822cc64221907f9d72ce3819fc13afc5b1331d033a6f9d39b05138e157c1e",
    "signature": "0x0761822008c3d2d1bf25fd390b88fe1dabda708c5d7558e6577844f318510861276b79a1ba2a73b5b482cdef0ab89ff60699747a102c94f493484f54c0d78c381c",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}