{
  "manageEntity": {
    "action": "Save",
    "entityId": "430079920",
    "entityType": "Track",
    "nonce": "0xf7d168570d44a7060371d1d85d54cb09681dd39af4e845089023a49364b4a40a",
    "signature": "0x20c5a834bfe02d1e02b5102a338ef0b7f48ae299ec2cc89995e58958da97a04b51700ee2a00ad83ccbf86fb1f012e4f049f4d773880434a6a1469c0f1c6462871b",
    "signer": "0x7f25D50E8D527E01C9ACAb7295ef4714147C8967",
    "userId": "232974797"
  }
}