{
  "manageEntity": {
    "action": "Save",
    "entityId": "319043",
    "entityType": "Track",
    "nonce": "0xea4249ef8608a234c32e06747317646f3dbefd8fce82680b6b515002632e58a6",
    "signature": "0x08e05cb3d4b7e5a298200cc15a54f36029d11de7f24fbf6c66206236013a1f3c1ef60a0dc4d69130045a5879f462addc33bccd45828be12160f57b3dc839c2371c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}