{
  "manageEntity": {
    "action": "Save",
    "entityId": "122966534",
    "entityType": "Track",
    "nonce": "0x2882d22467bfb31e5f864ebeecca68bc1563390355248f4f6e946d1d3a79b381",
    "signature": "0xbcec8167fe70e2e50c3879eb73f191593e47080945b7c86e7ee6c7c07d8746fd42e295e3ffe4fbaa66a39f4ed5d47e3a1b6e9923cd02da9862d3bc5478daa9ae1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}