{
  "manageEntity": {
    "action": "Save",
    "entityId": "572179046",
    "entityType": "Track",
    "nonce": "0x6bb0f7ff369045d60ef8e7cd2c3c285827640ab3c7163f6492e8c0f9d756bb19",
    "signature": "0xa8b33ee39568b9e2daba6f3994862a0eb277c0388a9bb2edd7047944ffdd57251b5420a2574a3c05310b734a760f400c07550b807e627baad1c5275dab38d64c1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}