{
  "manageEntity": {
    "action": "Save",
    "entityId": "995449214",
    "entityType": "Track",
    "nonce": "0x7e581bb1fd5cecd46caac0508d6124f4f7dec9dbbec696c0171cc183783966fd",
    "signature": "0x8d050d8e63724237bad079e75bccb01062f8db5b46d12d9461aa76df8afa33c6265a128a5d71a1289957b4135a3e3381462cdaa22bb6b5cf29317736ff7228f11c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}