{
  "manageEntity": {
    "action": "Save",
    "entityId": "1606870236",
    "entityType": "Track",
    "nonce": "0x84e4083cca3bfba802b3ac5924fdab33fd8e420183391491d41ce8c7755dd180",
    "signature": "0x4bb8dd38affb79ccf74c933b4a7417ec89e2cf004c3c7f10274db10bc1fe0b2f0ca46fc4e3f00187b1d36da3e05766d53c6585944e804aa718fa10bb138095d31b",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}