{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210714150",
    "entityType": "Track",
    "nonce": "0x29c21cef0ee640b49b9c46742b99f041425e372b6e419829aac16bab3861a9d8",
    "signature": "0x9c11535526de296e5940a96f219e4caea802975f5891405f43f7cb169ef316c95c08b31b482a076cce5b085617fe8446e4551cd4a23e42126093f151755cb1fe1c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}