{
  "manageEntity": {
    "action": "Save",
    "entityId": "1426116960",
    "entityType": "Track",
    "nonce": "0xbd397cde8c1968c6587cc9268015645fa26008e2ed15f0a4c1e845364d8575f9",
    "signature": "0x5727a52fca05fdd63af6b9fe1865e8833d3e69907db7b4fd005a0bd446c15bba0d422f103250564b4d066e5e46f2d418eb1f6893dcdb1dfb297af0321c1d0b6f1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}