{
  "manageEntity": {
    "action": "Save",
    "entityId": "2064868655",
    "entityType": "Track",
    "nonce": "0xfef4ae781dfdfead0f44ae89a025b858ad6e8c3ab376ccff6c81a546dc604c72",
    "signature": "0xc6255d6678ef607d0c5d203b0968a0eb9f6788e9c3099408ce4554457aa998905634ab5f0f152cb688c9c9890dd6414424d4aa413a084b155ba11fb416697cac1c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}