{
  "manageEntity": {
    "action": "Save",
    "entityId": "402524710",
    "entityType": "Track",
    "nonce": "0x4b31b6a22a07c8015c8536aecae618e40a3419a09fb7ecb273dc4758dcabfc66",
    "signature": "0x76b31e0f0b723a334142ecae48831d5f7b8fbfaad85f3782b6a009eec40ad77869822d8d00a69714da0439a3ba540ea44d881037e63e70cc122aa66457f418331c",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}