{
  "manageEntity": {
    "action": "Save",
    "entityId": "1977473595",
    "entityType": "Track",
    "nonce": "0x65d022af8e4c239f6574bf1f8915da0b0b845fef88e2cf387031526c6d7e22b0",
    "signature": "0x146263380c02590d9d2d58f59e57131ceefd06d0baff1d001032afc9da02af5e3989f70163eab3d58e3ef413681e1838730935644b37f6cbd274277ce69ee0511c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}