{
  "manageEntity": {
    "action": "Save",
    "entityId": "1241806148",
    "entityType": "Track",
    "nonce": "0xfabc78d2f3173430f4b0b27e9000ece5fd6670f0631c916fd67ddd02659831f5",
    "signature": "0x700fc5d7454bd2f98933d43181c913f542da047f43eaad04ee68815cb75159b43ef8186fa77a271226c21123e40cd4d7610a134d2a47320422363aea0966f3c21b",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}