{
  "manageEntity": {
    "action": "Save",
    "entityId": "167775",
    "entityType": "Track",
    "nonce": "0x9fb596cb3c4093c47f94a541cb9985560e4e725d7669e2a1dc93455966797bea",
    "signature": "0xde8af3c9fb01fd26935ebdc734ad63eafb58e7d8f9bf5c27d6854ddd44095e884f182c0802cd2da1935c7a788181a5513b5e8240ee7adff4c588c8b66adcaa101b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}