{
  "manageEntity": {
    "action": "Save",
    "entityId": "932354711",
    "entityType": "Track",
    "nonce": "0xf1ccc1b3fc3f90305ae95998952aa4c2fb7a67014746d5461ae07134e7b8d38e",
    "signature": "0xe14a0c6341605da8d13398e47b2d9a6470be09c637bb31f9ef94ed34630b5eaf330d99b9d74d64c2c585729a4b283f0333df3484b8d0604dfb2679abc1051da41b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}