{
  "manageEntity": {
    "action": "Save",
    "entityId": "1044433",
    "entityType": "Track",
    "nonce": "0x40ab4431abab58e105df618e8c551a99b9e136893042c1e383ebf8a06f2c4cc5",
    "signature": "0xd75c55c413686b2c941c31574550f04a4b7b476e01ae6310f4afa88afeadb24d02236714c69b1a92640d321e1e5289c43ee4323ab387b9d89521ae496eb43ac81c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}