{
  "manageEntity": {
    "action": "Save",
    "entityId": "25203",
    "entityType": "Track",
    "nonce": "0xea6783181ad78aab3ebc3a7ee83607043ed64e5e77574a26a69577317b095e3f",
    "signature": "0x8f2c6ab53e09a205ec6f7ab7042c2099496ad62b0e8940ac8d97eb5f32d8cad5555e247b418d853c94d78ae6c83250c92cace8978ff72209251134439f7753021b",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}